GG Tauri A: gas properties and dynamics from the cavity to the outer disk
| Autor: | Anne Dutrey, Jeffrey S. Bary, E. Chapillon, Vincent Piétu, Arnaud Pierens, J.-M. Huré, Tracy L. Beck, Stéphane Guilloteau, F. Hersant, P. Tuan-Anh, Pham Ngoc Diep, N. T. Phuong, Pham Tuyet Nhung, E. Di Folco, Do Thi Hoai, Ya-Wen Tang |
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| Přispěvatelé: | AMOR 2020, Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de RadioAstronomie Millimétrique (IRAM), Centre National de la Recherche Scientifique (CNRS), Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), Academia Sinica, Universität Erlangen-Nürnberg - Erlangen, ECLIPSE 2020, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Vietnam National Satellite Center (VNSC) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
010504 meteorology & atmospheric sciences
Thermodynamic equilibrium FOS: Physical sciences Kinematics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Kinetic energy 01 natural sciences circumstellar matter stars: individual: GG Tauri A Planet 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences Physics Earth and Planetary Astrophysics (astro-ph.EP) protoplanetary disks Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies T Tauri star Wavelength Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Millimeter Astrophysics::Earth and Planetary Astrophysics [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] radio lines: stars Excitation Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Astronomy and Astrophysics-A&A Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 635, pp.A12. ⟨10.1051/0004-6361/201936173⟩ |
| ISSN: | 0004-6361 |
| DOI: | 10.1051/0004-6361/201936173⟩ |
| Popis: | We used new ALMA $^{13}$CO and C$^{18}$O(3-2) observations obtained at high angular resolution ($\sim$0.2") together with previous CO(3-2) and (6-5) ALMA data and continuum maps at 1.3 and 0.8 mm in order to determine the gas properties (temperature, density, and kinematics) in the cavity and to a lesser extent in the outer disk of GG Tau A, the prototype of a young triple T Tauri star that is surrounded by a massive and extended Keplerian outer disk. By deprojecting, we studied the radial and azimuthal gas distribution and its kinematics. We also applied a new method to improve the deconvolution of the CO data and in particular better quantify the emission from gas inside the cavity. We perform local and nonlocal thermodynamic equilibrium studies in order to determine the excitation conditions and relevant physical parameters inside the ring and in the central cavity. Residual emission after removing a smooth-disk model indicates unresolved structures at our angular resolution, probably in the form of irregular rings or spirals. The outer disk is cold, with a temperature $ 18 pages, 14 figures |
| Databáze: | OpenAIRE |
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